Geotechnical and Environmental Characterization of Boiler Slag as Fill Material
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 142, Issue 8
Abstract
Boiler slag is a by-product that is derived from coal combustion in wet bottom boilers. Due to its low bulk density, in the compacted state it is an attractive alternative for use as structural fill material. Compared with other coal combustion by-products, the geotechnical and leaching properties of boiler slag are less known. This paper presents the results of laboratory and field investigation of boiler slag, produced in boilers where brown coal is used as fuel. Chemical and mineralogical composition, as well as mechanical properties were studied in the laboratory. A test embankment was constructed in order to identify compaction behavior and the achieved layer stiffness. A lysimeter was installed as part of the test embankment for the long-term monitoring of the quality and quantity of percolated water.
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Acknowledgments
The research work is a result of the operation: Development Centre RC eNeM Ltd., sponsored by the European Regional Development Fund and the Republic of Slovenia. The cooperation of Mr. Boris Moškon and Mrs. Anica Murn is highly appreciated.
References
ACAA (American Coal Ash Association). (2015). “About coal ash. What are CCPs?.” 〈http://www.acaa-usa 285.org/〉 (Feb. 23, 2015).
Acar, Y. B., Seals, R. K., and Puppala, A. J. (1990). “Engineering and compaction characteristics of boiler slag.” Resources, gotechnics of waste fills-theory and practice, A. Landva and G. D. Knowles, eds., ASTM, Philadelphia, 123–141.
ASTM. (1995). “Standard test method for measurement of hydraulic conductivity of porous material using a rigid-wall, compaction-mold permeameter.” ASTM D5856-95, West Conshohocken, PA.
ASTM. (1998). “Standard test method for particle-size analysis of soils.” ASTM D422-63, West Conshohocken, PA.
ASTM. (2010a). “Standard test method for density of soil in place by the drive-cylinder method.” ASTM D2937-10, West Conshohocken, PA.
ASTM. (2010b). “Standard test methods for laboratory determination of water (moisture) content of soil and rock by mass.” ASTM D2216-10, West Conshohocken, PA.
ASTM. (2011a). “Standard practice for classification of soils for engineering purposes (unified soil classification system).” ASTM D2487-11, West Conshohocken, PA.
ASTM. (2011b). “Standard test method for direct shear test of soils under consolidated drained conditions.” ASTM D3080-11, West Conshohocken, PA.
ASTM. (2011c). “Standard test methods for one-dimensional consolidation properties of soils using incremental loading.” ASTM D2435-11, West Conshohocken, PA.
ASTM. (2012). “Standard test methods for laboratory compaction characteristics of soil using standard effort [12 400 ft-lbf/ft3 (600 kN-m/m3)].” ASTM D698-12, West Conshohocken, PA.
ASTM. (2014). “Standard test methods for specific gravity of soil solids by water pycnometer.” ASTM D854-14, West Conshohocken, PA.
Consoli, N. C., Heineck, K. S., Coop, M. R., Fonseca, A. V., and Fonseca, C. (2007). “Coal BA as a geomaterial: Influence of particle morphology on the behavior of granular material.” Soils Found., 47(2), 361–373.
ECOBA (European Coal Combustion Products Association) (2015). “Specification.” 〈http://www.ecoba.com/ecobaccpspec.html〉 (Feb. 23, 2015).
Feuerborn, J. (2011). “Coal combustion products in Europe—An update on production and utilisation, standardisation and regulation.” World of Coal Ash (WOCA) Conf., Center for Applied Energy Research, Univ. of Kentucky and the American Coal Ash Association, Lexington, KY.
Kim, B., and Prezzi, M. (2008). “Evaluation of the mechanical properties of class-F fly ash.” Waste Manage., 28(3), 649–659.
Kim, B., Prezzi, M., and Salgado, R. (2005). “Geotechnical properties of fly and BA mixtures for use in highway embankments.” J. Geotech. Geoenviron. Eng., 914–924.
Li, Y., Li, L., Cordero-Zayas, S., Santos, F., and Yaeger, S. J. (2014). “Environmental impact of FA utilization in roadway embankments.” J. Mater. Cycles Waste Manage., 16(4), 591–596.
Mejeoumov, G. G., Shon, C. S., Saylak, D., and Estakhri, C. K. (2010). “Beneficiation of stockpiled fluidized bed coal ash in road base course construction.” Constr. Build. Mater., 24(11), 2072–2078.
Republic of Slovenia, Office of Legislation. (2012). “Decree on the emission of substances and heat when discharging waste water into waters and the public sewage system.”, Ljubljana, Slovenia.
Republic of Slovenia, Office of Legislation. (2014a). “Decree on the emission of substances and heat when discharging waste water into waters and the public sewage system.”, Ljubljana, Slovenia.
Republic of Slovenia, Office of Legislation. (2014b). “Decree on waste landfill.”, Ljubljana, Slovenia.
SETRA (Service d’études sur les transports, les routes et leurs aménagements). (2011). “Acceptability of alternative materials in road construction, environmental assessment.” Sourdun, France.
Siddique, R. (2010). “Utilization of coal combustion by-products in sustainable construction materials.” Resour. Conserv. Recycl., 54(12), 1060–1066.
SIST (Slovenian Institute for Standardization). (1996a). “Water quality—Determination of chloride—Silver nitrate titration with chromate indicator (Mohr's method).” ISO 9297:1996, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (1996b). “Water quality—Determination of chromium (VI)—Spectrometric method using 1,5-diphenylcarbazide.” ISO 11083:1996, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (1996c). “Water quality—Determination of fluoride—Part 1: Electrochemical probe method for potable and lightly polluted water.” ISO 10359-1:1996, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (1998). “Water quality—Determination of electrical conductivity (ISO 7888:1985).” EN 27888:1998, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (2000). “Water quality—Determination of mercury.” ISO 5666:2000, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (2002). “Tests for chemical properties of aggregates—Part 3: Preparation of eluates by leaching of aggregates.” EN 1744-3:2002, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (2004a). “Characterisation of waste—Leaching—Compliance test for leaching of granular waste materials and sludges—Part 4: One stage batch test at a liquid to solid ratio of 10 l/kg for materials with particle size below 10 mm (without or with size reduction).” EN 12457-4:2004, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (2004b). “Characterization of waste—Leaching behaviour tests—Up-flow percolation test (under specified conditions).” CEN/TS 14405:2004, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (2004c). “Method of testing FA—Part 1: Determination of free calcium oxide content.” EN 451-1:2004, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (2009). “Water quality—Determination of selected elements by inductively coupled plasma optical emission spectrometry (ICP-OES) (ISO 11885:2007).” EN ISO 11885:2009, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (2011). “Cement—Part 1: Composition, specifications and conformity criteria for common cements.” EN 197-1:2011, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (2012). “Water quality—Determination of pH (ISO 10523:2008).” EN ISO 10523:2012, Ljubljana, Slovenia.
SIST (Slovenian Institute for Standardization). (2013). “Method of testing cement—Part 2: Chemical analysis of cement.” EN 196-2:2013, Ljubljana, Slovenia.
Yildirim, I., and Prezzi, M. (2015). “Geotechnical properties of fresh and aged basic oxygen furnace steel slag.” J. Mater. Civ. Eng., 04015046.
Yildirim, I. Z., and Prezzi, M. (2011). “Chemical, mineralogical, and morphological properties of steel slag.” Adv. Civ. Eng., 2011, 1–13.
Yoon, S., Balunaini, U., Yildirim, I., Prezzi, M., and Siddiki, N. (2009). “Construction of an embankment with a fly and BA mixture: Field performance study.” J. Mater. Civ. Eng., 271–278.
ZORN Instruments. (2011). “User manual for the light weight deflectometer (LWD) ZFG 3.0.” Stendal, Germany.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 142 • Issue 8 • August 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Apr 22, 2015
Accepted: Dec 31, 2015
Published online: Apr 6, 2016
Published in print: Aug 1, 2016
Discussion open until: Sep 6, 2016
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